Semiconductor device and electronic apparatus having the same

• US 8,471,596 B2
• Filed: 06/06/2011
• Issued: 06/25/2013
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime, Umezaki, Atsushi
• Primary Examiner(s): LE, DON P
• Application Number:
  US13/153,540
• Publication Number:
  US 20110233633A1
• Time in Patent Office: 750 Days
• Field of Search: 326 82- 86, 345/204, 345210-214
• US Class Current: 326/83
• CPC Class Codes: G09G 2310/0289 Details of voltage level shifters arranged for use in a driving circuit
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3283 in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors

Abstract

With an offset circuit including transistors of the same conductivity type, offset of an input signal is performed. Then, the input signal after the offset is supplied to a logic circuit including transistors of the same conductivity type as that of the offset circuit, thereby H and L levels of the input signal can be shifted at the same time. Further, since the offset circuit and the logic circuit are formed using the transistors of the same conductivity type, a display device can be manufactured at a low cost.

Claims

1. An electronic device comprising:

a first wiring;

a second wiring;

a third wiring;

a first capacitor electrically connected to the first wiring;

a second capacitor electrically connected to the second wiring;

a first transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the first transistor being electrically connected to the first capacitor, the first terminal of the first transistor being electrically connected to the second capacitor, and the second terminal of the first transistor being electrically connected to the third wiring; and

a second transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the second transistor being electrically connected to the second capacitor, the first terminal of the second transistor being electrically connected to the first capacitor, and the second terminal of the second transistor being electrically connected to the third wiring,

wherein no direct current path that does not go through the first transistor or the second transistor connects the first terminal of the first transistor to the first terminal of the second transistor.

2. An electronic device according to claim 1, wherein the gate terminal of the first transistor is electrically connected to the first wiring through the first capacitor.

3. An electronic device according to claim 1, wherein the gate terminal of the second transistor is electrically connected to the second wiring through the second capacitor.

4. An electronic device according to claim 1, wherein the first terminal of the first transistor and the gate terminal of the second transistor are connected to a same node.

5. An electronic device according to claim 1, wherein the first terminal of the first transistor is electrically connected to the second wiring through the second capacitor.

6. An electronic device according to claim 1, wherein the gate terminal of the second transistor is electrically connected to the second wiring through the second capacitor.

7. An electronic device according to claim 1, wherein the first transistor and the second transistor have a same conductivity type.

8. An electronic device according to claim 1, wherein the first and the second transistor comprise at least one of indium, gallium, zinc and oxygen.

9. An electronic device according to claim 1, wherein the electronic device is one of a computer, a game machine, an image reproducing device, a portable phone, a camera, a projector, a head-mounted display, and a display panel.

10. An electronic device according to claim 1, wherein no electrical connection that does not go through the first transistor or the second transistor connects the gate terminal of the first transistor to the gate terminal of the second transistor.

11. An electronic device comprising:

a first wiring;

a second wiring;

a third wiring;

a first capacitor including a first terminal electrically connected to the first wiring;

a second capacitor including a first terminal electrically connected to the second wiring;

a first transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the first transistor being electrically connected to a second terminal of the first capacitor, the first terminal of the first transistor being electrically connected to a second terminal of the second capacitor, and the second terminal of the first transistor being electrically connected to the third wiring; and

a second transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the second transistor being electrically connected to the second terminal of the second capacitor, the first terminal of the second transistor being electrically connected to the second terminal of the first capacitor, and the second terminal of the second transistor being electrically connected to the third wiring,

wherein no direct current path that does not go through the first transistor or the second transistor connects the first terminal of the first transistor to the first terminal of the second transistor.

12. An electronic device according to claim 11, wherein the first transistor and the second transistor have a same conductivity type.

13. An electronic device according to claim 11, wherein the first and the second transistor comprise at least one of indium, gallium, zinc and oxygen.

14. An electronic device according to claim 11, wherein the electronic device is one of a computer, a game machine, an image reproducing device, a portable phone, a camera, a projector, a head-mounted display, and a display panel.

15. An electronic device according to claim 11, wherein no electrical connection that does not go through the first transistor or the second transistor connects the gate terminal of the first transistor to the gate terminal of the second transistor.

16. An electronic device comprising:

a first wiring;

a second wiring;

a third wiring;

a fourth wiring;

a first capacitor electrically connected to the first wiring;

a second capacitor electrically connected to the second wiring;

a first transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the first transistor being electrically connected to the first capacitor, the first terminal of the first transistor being electrically connected to the second capacitor, and the second terminal of the first transistor being electrically connected to the third wiring;

a second transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the second transistor being electrically connected to the second capacitor, the first terminal of the second transistor being electrically connected to the first capacitor, and the second terminal of the second transistor being electrically connected to the third wiring;

a third transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the third transistor being electrically connected to the second capacitor, the first terminal of the third transistor being electrically connected to the fourth wiring, and the second terminal of the third transistor being electrically connected to the third wiring.

17. An electronic device according to claim 16, wherein the gate terminal of the first transistor is electrically connected to the first wiring through the first capacitor.

18. An electronic device according to claim 16, wherein the gate terminal of the second transistor is electrically connected to the second wiring through the second capacitor.

19. An electronic device according to claim 16, wherein the first terminal of the first transistor and the gate terminal of the second transistor are connected to a same node.

20. An electronic device according to claim 16, wherein the first terminal of the first transistor is electrically connected to the second wiring through the second capacitor.

21. An electronic device according to claim 16, wherein the gate terminal of the second transistor is electrically connected to the second wiring through the second capacitor.

22. An electronic device according to claim 16, wherein the first transistor and the second transistor have a same conductivity type.

23. An electronic device according to claim 16, wherein the first and the second transistor comprise at least one of indium, gallium, zinc and oxygen.

24. An electronic device according to claim 16, wherein the electronic device is one of a computer, a game machine, an image reproducing device, a portable phone, a camera, a projector, a head-mounted display, and a display panel.

25. An electronic device according to claim 16, wherein no direct current path that does not go through the first transistor or the second transistor connects the first terminal of the first transistor to the first terminal of the second transistor.

26. An electronic device according to claim 16, wherein no electrical connection that does not go through the first transistor or the second transistor connects the gate terminal of the first transistor to the gate terminal of the second transistor.